Question

I have searched the classes \Phalcon\Mvc\Controller & \Phalcon\DI\Injectable, but cannot understand where the filter attribute comes from.

If in the controller I use

$this->filter

where does it come from? The interfaces do not reflect this attribute anywhere.

Thanks

Related to (https://stackoverflow.com/questions/13303141/controllers-attr-this-filter-where-from) which was unfortunately closed due to the original poster’s English.

Answer 1

In the Phalcon Dependency Injection (\Phalcon\DI) container, services are registered and interact with one another.

The \Phalcon\Mvc\Controller automatically allows access to the services registered in the DI container with the use of magic methods.

So imagine you have registered a filter service in your DI container:

$di->set(
    'filter',
    function () 
    {
        return new \Phalcon\Filter();
    }
}

This service is now available in your controller with the following ways:

$filter = $this->filter;

or

$filter = \Phalcon\DI::getDefault()->get('filter');

The same goes for anything that has been stored in the DI container.